Mayor Bloomberg yesterday announced his plans to spend between $10 million and $15 million through a "super PAC" he will spearhead. It's named Independence USA PAC and has a goal of supporting candidates across party lines who pledge to work in a bipartisan fashion. It will spend money on highly competitive state, local and Congressional races this year and back candidates who support legalizing same-sex marriage, enacting tougher gun laws, and education reform.